The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 29, 2005
Filed:
Dec. 19, 2003
Applicant:
Ramesh M. Chandrasekaran, Plano, TX (US);
Inventor:
Ramesh M. Chandrasekaran, Plano, TX (US);
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
H03F001/14 ;
U.S. Cl.
CPC ...
Abstract
A switch capacitor amplifier using a 'bottom plate sampling' type arrangement in the feedback network to mitigate the reduction in linearity due to feedback switch charge injection. The switch (A) connecting the feedback capacitor (Cf) to the opamp () input is opened prior to the switch (A) connecting the feedback capacitor (Cf) to the output such that the charge injected into the opamp input nodes come from the switch connected to the opamp input, and is independent of the signal value to the first order as the switches are at the opamp input common mode voltage.